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  5. 解答・解説お願いします🙏😭 途中式なども教...
Mathematics
Senior High
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ran
ran

解答・解説お願いします🙏😭
途中式なども教えて欲しいです

次の和を求めよ。 n (1) (2k+1) k=1 n (2) (3k-5) (3) k=1 n-1 (3) 4k k=1

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